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15-letter words containing i, t, u

  • nucleophilicity — (uncountable) The condition of being nucleophilic.
  • nucleosynthesis — the formation of new atomic nuclei by nuclear reactions, thought to occur in the interiors of stars and in the early stages of development of the universe.
  • nucleosynthetic — Of or pertaining to nucleosynthesis.
  • nuke the fridge — (of a film, etc.) to lose credibility following a particularly ill-judged scene or plot development
  • null hypothesis — (in the statistical testing of a hypothesis) the hypothesis to be tested.
  • numismatologist — One versed in numismatology.
  • nursing studies — the study of nursing
  • nutcracker chin — a strong-looking chin
  • nutmeg geranium — a southern African plant, Pelargonium fragrans, of the geranium family, having hairy leaves with scalloped margins and nutmeg-scented clusters of white flowers, of which the two upper petals are veined deep pink.
  • nyquist theorem — (communications)   A theorem stating that when an analogue waveform is digitised, only the frequencies in the waveform below half the sampling frequency will be recorded. In order to reconstruct (interpolate) a signal from a sequence of samples, sufficient samples must be recorded to capture the peaks and troughs of the original waveform. If a waveform is sampled at less than twice its frequency the reconstructed waveform will effectively contribute only noise. This phenomenon is called "aliasing" (the high frequencies are "under an alias"). This is why the best digital audio is sampled at 44,000 Hz - twice the average upper limit of human hearing. The Nyquist Theorem is not specific to digitised signals (represented by discrete amplitude levels) but applies to any sampled signal (represented by discrete time values), not just sound.
  • obituary column — the division of a publication reserved for obituaries
  • oblique section — a representation of an object as it would appear if cut by a plane that is other than parallel or perpendicular to its longest axis.
  • obstructionists — Plural form of obstructionist.
  • obstructiveness — The characteristic of being obstructive.
  • obtuse triangle — a triangle with one obtuse angle.
  • occulting light — a beacon having a light covered briefly at regular intervals.
  • octanitrocubane — (organic compound) A high explosive derived from cubane.
  • odd permutation — a permutation of a set of n elements, x 1 , x 2 , …, xn, which permutes the product of all differences of the form (xi – xj), where i is less than j, into the negative of the product.
  • oligonucleotide — a chain of a few nucleotides.
  • omnibus edition — a television or radio programme consisting of two or more programmes broadcast earlier in the week
  • omnium gatherum — a miscellaneous collection.
  • omnium-gatherum — a miscellaneous collection.
  • on the qui viveon the qui vive, on the alert; watchful: Special guards were on the qui vive for trespassers.
  • open university — higher education by correspondence
  • open-cut mining — mining by excavating from the surface
  • opisthognathous — having receding jaws.
  • opposite number — counterpart; equivalent: New members with an interest in folk art will find their opposite numbers in the association's directory.
  • optical pumping — a method for increasing the number of atoms or molecules occupying higher energy levels by irradiating them with light of the proper frequencies to raise them to those levels.
  • ornithorhynchus — the platypus.
  • ortho-toluidine — Chemistry. a light-yellow, very slightly water-soluble liquid, C 7 H 9 N, the ortho isomer of toluidine: used in the manufacture of dyes, saccharin, and other organic compounds, and in textile printing processes.
  • ostreiculturist — a person who breeds oysters
  • out in the cold — having a relatively low temperature; having little or no warmth: cold water; a cold day.
  • out in the open — knowledge: public
  • out of business — If a shop or company goes out of business or is put out of business, it has to stop trading because it is not making enough money.
  • out of practice — If you are out of practice at doing something, you have not had much experience of it recently, although you used to do it a lot or be quite good at it.
  • out of sight of — not in sight
  • out of thin air — suddenly and unexpectedly
  • out of training — become unfit
  • outdoorsmanship — a person devoted to outdoor sports and recreational activities, as hiking, hunting, fishing, or camping.
  • outer barrister — a barrister belonging to the outer bar.
  • outline drawing — a drawing consisting only of external lines
  • outside caliper — a caliper whose legs turn inward so that it can measure outside dimensions, as the diameter of a rod.
  • outside forward — one of two attacking players who usually play on the far side of the field; wing.
  • outside the box — a container, case, or receptacle, usually rectangular, of wood, metal, cardboard, etc., and often with a lid or removable cover.
  • outstandingness — prominent; conspicuous; striking: an outstanding example of courage.
  • outward-looking — looking beyond oneself; open-minded and reaching out to other people, organizations, etc
  • over-articulate — excessively articulate
  • over-cultivated — to prepare and work on (land) in order to raise crops; till.
  • over-enthusiasm — absorbing or controlling possession of the mind by any interest or pursuit; lively interest: He shows marked enthusiasm for his studies.
  • over-particular — of or relating to a single or specific person, thing, group, class, occasion, etc., rather than to others or all; special rather than general: one's particular interests in books.
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